F550, stock 8" props, naza gps module, aeroXcraft landing gear/gopro gimbal, gopro hero2 with wi-fi backpack, nano-tech 4S 6000 25C getting around 11 mins to 80% depletion. i have my timer set to 9.5 mins to give enough rtb time.
With Std ECS and Stock Motors DJI Recommend not to use 10" on 4S setup. This could cause overheating. However I know guys do use that setup.
DJI F550 with Naza & GPS. Graupner 10x5 props, GoPro II, Aeroxcraft landing and gimbal mount and GensAce 4S 5500 mah. Total weight 2.41 kg. 7 minutes with 20 to 30% battery left.